摘要
本文利用1982年7—9月地面气压,850、500hPa高度和温度,广东地区测站的雨量等资料,进行功率谱、交叉谱、凝聚谱以及相关系数的计算。结果表明,这年夏季,印缅槽存在准三周的周期振荡,澳大利亚冷高压存在准两周的周期振荡,两者叠加的结果,与广东地区降水存在的准两周和准一周的振荡周期相吻合。研究还指出,这两个系统的周期变化比广东地区的降水超前1—3天。
Using surface pressure,height and temperature data at 850 and 500 hPa.and rainfall records in Guangdong stations for July-September, 1982, power spectrum, cross spectrum, coagulation spectrum and correlation coefficient are derived in this paper. It shows that there is a quasi-3-week oscillation for the Indochina- Burma Trough and quasi- biweekly oscillation for the Australian Cold High and that their superimposed result is consistent with the quasi-biweekly and quasi-weekly oscillations for the precipitation in Guangdong. It is also shown that the periodic variations in the former two systems take place 1 - 3 days in advance of the ones in Guangdong precipitation.
出处
《热带气象》
CSCD
1991年第2期176-181,共6页
基金
国家气象局热带气象科学基金资助项目
